Granted Patent
Utility
US 6,567,367 · App. 09/842,035
Multilevel recording and reproduction method and phase change multilevel recording medium
Inventors:
Takashi Ohno, Michikazu Horie
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Apr 26, 2001
Inventors
Takashi Ohno
Michikazu Horie
Assignee (at issue)
MITSUBISHI CHEMICAL CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.